Extract

In a previous paper from this laboratory (Andrade and Tsien 1937) the particular interest of body-centred cubic crystals was pointed out, and the glide elements for single crystals of sodium and potassium at atmospheric temperatures were determined, viz. glide plane (123) and glide direction [111]. Another paper (Tsien and Chow 1937) describes the determination of the glide elements for molybdenum, for which the glide direction was again [111], but the glide plane was different at different temperatures, viz. (110) at 1000° C and (112) at 300 and 20° C. Planes (123), (110) and (112) have all been given as glide planes for α-iron by different workers (Taylor and Elam 1926; Gough 1928; Fahrenhorst and Schmid 1932), while for tungsten (Goucher 1924) the glide plane has been given as (112) and for β-brass under certain conditions (G. I. Taylor 1928) as (110).

Footnotes

This text was harvested from a scanned image of the original document using optical character recognition (OCR) software. As such, it may contain errors. Please contact the Royal Society if you find an error you would like to see corrected. Mathematical notations produced through Infty OCR.